Question

(6х+7)(6х-7)+12х=12х(3х+1)-49

Answer 1

(6x+7)*(6x)+12x=12x*(3x+1)-49
36x²-49+12x=36x+12x-49
36x²-36x=0  I÷36
x²-1=0
x=1    x=-1.

Answer 2

(6x+7)(6x-7)+12x=12x(3x+1)-49
$6x^{2} - 7^{2}$ +12x=36x+12x-49
$6x^{2} - 7^{2}$ +12x-12x-36x+$7^{2}$=0
[tex] 6x^{2} - 36x=0
6x(x-6)=0
6x=0         x-6=0
x=0           x=6